328704431 has 8 divisors (see below), whose sum is σ = 374177664. Its totient is φ = 285829720.

The previous prime is 328704407. The next prime is 328704449. The reversal of 328704431 is 134407823.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 328704431 - 2¹⁸ = 328442287 is a prime.

It is a super-2 number, since 2×328704431² = 216093205918067522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328704031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 649361 + ... + 649866.

It is an arithmetic number, because the mean of its divisors is an integer number (46772208).

Almost surely, 2^328704431 is an apocalyptic number.

328704431 is a deficient number, since it is larger than the sum of its proper divisors (45473233).

328704431 is a wasteful number, since it uses less digits than its factorization.

328704431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1299261.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 328704431 is about 18130.2076932395. The cubic root of 328704431 is about 690.1368005732.

The spelling of 328704431 in words is "three hundred twenty-eight million, seven hundred four thousand, four hundred thirty-one".